The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 21, 1992
Filed:
Oct. 20, 1989
Applicant:
Inventors:
Toshiaki Morichika, Hirakata, JP;
Toshio Tani, Takatsuki, JP;
Chiaki Sakai, Osaka, JP;
Hideo Koshimoto, Takatsuki, JP;
Tatsuhiko Kadowaki, Ibaraki, JP;
Assignee:
Kubota Ltd., Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428694 ; 428611 ; 428667 ; 428678 ; 428900 ; 428928 ;
Abstract
A magnetic recording medium having excellent noise characteristics and comprising a metal magnetic film formed on a nonmagnetic substrate and made of (1) a Co-Cr-Nb alloy, or (2) a Co-Cr-Ni-Nb alloy. The alloys (1) and (2) are represented respectively by the following formulae: